Extraction: Solvent Extraction: Two-Phase Aqueous Liquid Extraction

Abstract

Two phase aqueous liquid extraction—widely known as homogeneous liquid liquid extraction (HLLE)—can be considered as a valuable option to overcome the drawbacks and limitations of traditional liquid liquid extraction. The principle behind this technique is based on the usage of high dielectric constant organic solvent which is completely miscible with the aqueous phase. The conducting surface between the aqueous and organic phase is considered as infinitive. Phase separation is mainly accomplished by (i) the addition of an electrolyte, (ii) temperature change, (iii) alteration of pH, and (iv) ion-pair formation.